#!/usr/bin/env python3
"""
Admin tools for managing burmddit articles
"""

import psycopg2
from dotenv import load_dotenv
import os
from datetime import datetime
from loguru import logger
import sys

load_dotenv()

def get_connection():
    """Get database connection"""
    return psycopg2.connect(os.getenv('DATABASE_URL'))

def list_articles(status=None, limit=20):
    """List articles with optional status filter"""
    conn = get_connection()
    cur = conn.cursor()
    
    if status:
        cur.execute('''
            SELECT id, title, status, published_at, view_count,
                   LENGTH(content) as content_len,
                   LENGTH(content_burmese) as burmese_len
            FROM articles
            WHERE status = %s
            ORDER BY published_at DESC
            LIMIT %s
        ''', (status, limit))
    else:
        cur.execute('''
            SELECT id, title, status, published_at, view_count,
                   LENGTH(content) as content_len,
                   LENGTH(content_burmese) as burmese_len
            FROM articles
            ORDER BY published_at DESC
            LIMIT %s
        ''', (limit,))
    
    articles = []
    for row in cur.fetchall():
        articles.append({
            'id': row[0],
            'title': row[1][:60] + '...' if len(row[1]) > 60 else row[1],
            'status': row[2],
            'published_at': row[3],
            'views': row[4] or 0,
            'content_len': row[5],
            'burmese_len': row[6]
        })
    
    cur.close()
    conn.close()
    
    return articles

def unpublish_article(article_id: int, reason: str = "Error/Quality issue"):
    """Unpublish an article (change status to draft)"""
    conn = get_connection()
    cur = conn.cursor()
    
    # Get article info first
    cur.execute('SELECT id, title, status FROM articles WHERE id = %s', (article_id,))
    article = cur.fetchone()
    
    if not article:
        logger.error(f"Article {article_id} not found")
        cur.close()
        conn.close()
        return False
    
    logger.info(f"Unpublishing article {article_id}: {article[1][:60]}...")
    logger.info(f"Current status: {article[2]}")
    logger.info(f"Reason: {reason}")
    
    # Update status to draft
    cur.execute('''
        UPDATE articles
        SET status = 'draft',
            updated_at = NOW()
        WHERE id = %s
    ''', (article_id,))
    
    conn.commit()
    logger.info(f"✅ Article {article_id} unpublished successfully")
    
    cur.close()
    conn.close()
    
    return True

def republish_article(article_id: int):
    """Republish an article (change status to published)"""
    conn = get_connection()
    cur = conn.cursor()
    
    # Get article info first
    cur.execute('SELECT id, title, status FROM articles WHERE id = %s', (article_id,))
    article = cur.fetchone()
    
    if not article:
        logger.error(f"Article {article_id} not found")
        cur.close()
        conn.close()
        return False
    
    logger.info(f"Republishing article {article_id}: {article[1][:60]}...")
    logger.info(f"Current status: {article[2]}")
    
    # Update status to published
    cur.execute('''
        UPDATE articles
        SET status = 'published',
            updated_at = NOW()
        WHERE id = %s
    ''', (article_id,))
    
    conn.commit()
    logger.info(f"✅ Article {article_id} republished successfully")
    
    cur.close()
    conn.close()
    
    return True

def delete_article(article_id: int):
    """Permanently delete an article"""
    conn = get_connection()
    cur = conn.cursor()
    
    # Get article info first
    cur.execute('SELECT id, title, status FROM articles WHERE id = %s', (article_id,))
    article = cur.fetchone()
    
    if not article:
        logger.error(f"Article {article_id} not found")
        cur.close()
        conn.close()
        return False
    
    logger.warning(f"⚠️  DELETING article {article_id}: {article[1][:60]}...")
    
    # Delete from database
    cur.execute('DELETE FROM articles WHERE id = %s', (article_id,))
    
    conn.commit()
    logger.info(f"✅ Article {article_id} deleted permanently")
    
    cur.close()
    conn.close()
    
    return True

def find_problem_articles():
    """Find articles with potential issues"""
    conn = get_connection()
    cur = conn.cursor()
    
    issues = []
    
    # Issue 1: Translation too short (< 30% of original)
    cur.execute('''
        SELECT id, title, 
               LENGTH(content) as en_len,
               LENGTH(content_burmese) as mm_len,
               ROUND(100.0 * LENGTH(content_burmese) / NULLIF(LENGTH(content), 0), 1) as ratio
        FROM articles
        WHERE status = 'published'
          AND LENGTH(content_burmese) < LENGTH(content) * 0.3
        ORDER BY ratio ASC
        LIMIT 10
    ''')
    
    for row in cur.fetchall():
        issues.append({
            'id': row[0],
            'title': row[1][:50],
            'issue': 'Translation too short',
            'details': f'EN: {row[2]} chars, MM: {row[3]} chars ({row[4]}%)'
        })
    
    # Issue 2: Missing Burmese content
    cur.execute('''
        SELECT id, title
        FROM articles
        WHERE status = 'published'
          AND (content_burmese IS NULL OR LENGTH(content_burmese) < 100)
        LIMIT 10
    ''')
    
    for row in cur.fetchall():
        issues.append({
            'id': row[0],
            'title': row[1][:50],
            'issue': 'Missing Burmese translation',
            'details': 'No or very short Burmese content'
        })
    
    # Issue 3: Very short articles (< 500 chars)
    cur.execute('''
        SELECT id, title, LENGTH(content) as len
        FROM articles
        WHERE status = 'published'
          AND LENGTH(content) < 500
        LIMIT 10
    ''')
    
    for row in cur.fetchall():
        issues.append({
            'id': row[0],
            'title': row[1][:50],
            'issue': 'Article too short',
            'details': f'Only {row[2]} chars'
        })
    
    cur.close()
    conn.close()
    
    return issues

def get_article_details(article_id: int):
    """Get detailed info about an article"""
    conn = get_connection()
    cur = conn.cursor()
    
    cur.execute('''
        SELECT id, title, title_burmese, slug, status,
               LENGTH(content) as content_len,
               LENGTH(content_burmese) as burmese_len,
               category_id, author, reading_time,
               published_at, view_count, created_at, updated_at,
               LEFT(content, 200) as content_preview,
               LEFT(content_burmese, 200) as burmese_preview
        FROM articles
        WHERE id = %s
    ''', (article_id,))
    
    row = cur.fetchone()
    
    if not row:
        return None
    
    article = {
        'id': row[0],
        'title': row[1],
        'title_burmese': row[2],
        'slug': row[3],
        'status': row[4],
        'content_length': row[5],
        'burmese_length': row[6],
        'translation_ratio': round(100.0 * row[6] / row[5], 1) if row[5] > 0 else 0,
        'category_id': row[7],
        'author': row[8],
        'reading_time': row[9],
        'published_at': row[10],
        'view_count': row[11] or 0,
        'created_at': row[12],
        'updated_at': row[13],
        'content_preview': row[14],
        'burmese_preview': row[15]
    }
    
    cur.close()
    conn.close()
    
    return article

def print_article_table(articles):
    """Print articles in a nice table format"""
    print()
    print("=" * 100)
    print(f"{'ID':<5} {'Title':<50} {'Status':<12} {'Views':<8} {'Ratio':<8}")
    print("-" * 100)
    
    for a in articles:
        ratio = f"{100.0 * a['burmese_len'] / a['content_len']:.1f}%" if a['content_len'] > 0 else "N/A"
        print(f"{a['id']:<5} {a['title']:<50} {a['status']:<12} {a['views']:<8} {ratio:<8}")
    
    print("=" * 100)
    print()

def main():
    """Main CLI interface"""
    import argparse
    
    parser = argparse.ArgumentParser(description='Burmddit Admin Tools')
    subparsers = parser.add_subparsers(dest='command', help='Commands')
    
    # List command
    list_parser = subparsers.add_parser('list', help='List articles')
    list_parser.add_argument('--status', choices=['published', 'draft'], help='Filter by status')
    list_parser.add_argument('--limit', type=int, default=20, help='Number of articles')
    
    # Unpublish command
    unpublish_parser = subparsers.add_parser('unpublish', help='Unpublish an article')
    unpublish_parser.add_argument('article_id', type=int, help='Article ID')
    unpublish_parser.add_argument('--reason', default='Error/Quality issue', help='Reason for unpublishing')
    
    # Republish command
    republish_parser = subparsers.add_parser('republish', help='Republish an article')
    republish_parser.add_argument('article_id', type=int, help='Article ID')
    
    # Delete command
    delete_parser = subparsers.add_parser('delete', help='Delete an article permanently')
    delete_parser.add_argument('article_id', type=int, help='Article ID')
    delete_parser.add_argument('--confirm', action='store_true', help='Confirm deletion')
    
    # Find problems command
    subparsers.add_parser('find-problems', help='Find articles with issues')
    
    # Details command
    details_parser = subparsers.add_parser('details', help='Show article details')
    details_parser.add_argument('article_id', type=int, help='Article ID')
    
    args = parser.parse_args()
    
    # Configure logger
    logger.remove()
    logger.add(sys.stdout, format="<level>{message}</level>", level="INFO")
    
    if args.command == 'list':
        articles = list_articles(status=args.status, limit=args.limit)
        print_article_table(articles)
        print(f"Total: {len(articles)} articles")
        
    elif args.command == 'unpublish':
        unpublish_article(args.article_id, args.reason)
        
    elif args.command == 'republish':
        republish_article(args.article_id)
        
    elif args.command == 'delete':
        if not args.confirm:
            logger.error("⚠️  Deletion requires --confirm flag to prevent accidents")
            return
        delete_article(args.article_id)
        
    elif args.command == 'find-problems':
        issues = find_problem_articles()
        if not issues:
            logger.info("✅ No issues found!")
        else:
            print()
            print("=" * 100)
            print(f"Found {len(issues)} potential issues:")
            print("-" * 100)
            for issue in issues:
                print(f"ID {issue['id']}: {issue['title']}")
                print(f"  Issue: {issue['issue']}")
                print(f"  Details: {issue['details']}")
                print()
            print("=" * 100)
            print()
            print("To unpublish an article: python3 admin_tools.py unpublish <ID>")
            
    elif args.command == 'details':
        article = get_article_details(args.article_id)
        if not article:
            logger.error(f"Article {args.article_id} not found")
            return
        
        print()
        print("=" * 80)
        print(f"Article {article['id']} Details")
        print("=" * 80)
        print(f"Title (EN): {article['title']}")
        print(f"Title (MM): {article['title_burmese']}")
        print(f"Slug: {article['slug']}")
        print(f"Status: {article['status']}")
        print(f"Author: {article['author']}")
        print(f"Published: {article['published_at']}")
        print(f"Views: {article['view_count']}")
        print()
        print(f"Content length: {article['content_length']} chars")
        print(f"Burmese length: {article['burmese_length']} chars")
        print(f"Translation ratio: {article['translation_ratio']}%")
        print()
        print("English preview:")
        print(article['content_preview'])
        print()
        print("Burmese preview:")
        print(article['burmese_preview'])
        print("=" * 80)
        
    else:
        parser.print_help()

if __name__ == '__main__':
    main()